/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 package org.apache.myfaces.view.facelets.tag.composite;

 import java.io.Externalizable;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.ObjectInput;

 import java.io.ObjectOutput;

 import java.net.URL;

 import java.util.Map;

 import javax.faces.FacesWrapper;

 import javax.faces.application.Resource;

 import javax.faces.context.FacesContext;

 /**

  * The value inside composite component attribute map with the key

  * Resource.COMPONENT_RESOURCE_KEY should be a Serializable. This

  * wrapper add serialization to Resource instances, because 

  * ResourceImpl depends from the ResourceLoader used by it.

  * 

  * @author Leonardo Uribe (latest modification by $Author$)

  * @version $Revision$ $Date$

  */

 public final class CompositeResouceWrapper extends Resource 

     implements FacesWrapper<Resource>, Externalizable

 {

     /**

      * 

      */

     private static final long serialVersionUID = 8067930634887545843L;

     private transient Resource _delegate;

     public CompositeResouceWrapper()

     {

         super();

     }

     public CompositeResouceWrapper(Resource delegate)

     {

         super();

         this._delegate = delegate;

         setResourceName(delegate.getResourceName());

         setLibraryName(delegate.getLibraryName());

         setContentType(delegate.getContentType());

     }

     public InputStream getInputStream() throws IOException

     {

         return getWrapped().getInputStream();

     }

     public String getRequestPath()

     {

         return getWrapped().getRequestPath();

     }

     public Map<String, String> getResponseHeaders()

     {

         return getWrapped().getResponseHeaders();

     }

     public URL getURL()

     {

         return getWrapped().getURL();

     }

     public boolean userAgentNeedsUpdate(FacesContext context)

     {

         return getWrapped().userAgentNeedsUpdate(context);

     }

     public Resource getWrapped()

     {

         if (_delegate == null)

         {

             _delegate = FacesContext.getCurrentInstance().getApplication().

                             getResourceHandler().createResource(

                                     getResourceName(), 

                                     getLibraryName(),

                                     getContentType());

         }

         return _delegate;

     }

     public void readExternal(ObjectInput in) throws IOException,

             ClassNotFoundException

     {

         setResourceName((String) in.readObject());

         setLibraryName((String) in.readObject());

         setContentType((String) in.readObject());

     }

     public void writeExternal(ObjectOutput out) throws IOException

     {

         out.writeObject(getResourceName());

         out.writeObject(getLibraryName());

         out.writeObject(getContentType());

     }

     @Override

     public String toString()

     {

         // Delegate resource in this case could not be available in serialization, or

         // serialization could happen in other context. So it is better to return

         // a simple String representing the object without go into delegation.

         return ( (getLibraryName() != null) ? getLibraryName() : "") + ":"+ 

                ( (getResourceName() != null) ? getResourceName() : "") ;

     }

 }